tsconfig.json

{
  "compilerOptions": {
    /* Basic Options */
    "target": "es6", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', or 'ESNEXT'. */
    "module": "commonjs", /* Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'. */
    "lib": [
      "dom",
      "es5",
      "es6",
      "esnext.asynciterable"
    ], /* Specify library files to be included in the compilation:  */
    "sourceRoot": "./src/", /* Specify the location where debugger should locate TypeScript files instead of source locations. */
    "outDir": "./dist/", /* Redirect output structure to the directory. */
    "removeComments": true, /* Do not emit comments to output. */
    "strict": true, /* Enable all strict type-checking options. */
    "noImplicitAny": true, /* Raise error on expressions and declarations with an implied 'any' type. */
    "inlineSourceMap": true, /* Emit a single file with source maps instead of having a separate file. */
    "inlineSources": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
    "typeRoots": [
      "./node_modules/@types"
    ], /* List of folders to include type definitions from. */
    "experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */
    "emitDecoratorMetadata": true /* Enables experimental support for emitting type metadata for decorators. */
  },
  "exclude": [
    "node_modules"
  ]
}